OBDII device: it should connect car and computer.
Sense dongle: it must connect to computer while the software is running.
Software: First choose car type, then you can use Read KM to get the old KM. Also you can use Write KM to change KM in car.

2. Function

Read KM: Read KM from car
Write KM: Write new KM into car.
About…: The support instrument dash num, device info, newest version, update etc. All info can be get from here.

1).While the KM is reading:

2) After reading success

3) While writing KM

4) After written success.

While change KM, just follow the tips give in software bottom.
You can try some times if Write KM failed.